ZyXEL Communications XGS4600 Series, Руководство пользователя

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Chapter 54 DHCP
XGS4600 Series User’s Guide
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54.4.7 Configure DHCPv4 VLAN Port
Use this screen to apply a different DHCP option 82 profile to certain ports in a VLAN. To open this screen,
click
IP Application > DHCP > DHCPv4 > VLAN > Port .
Primary/
Secondary
DNS Server
Enter the IP addresses of the DNS servers. The DNS servers are passed to the DHCP clients along
with the IP address and the subnet mask.
Lease Time Select Infinite to have the binding always valid. Select the second radio button to set up the
binding’s valid days, hours and minutes.
Relay Use this section if you want to configure the Switch to function as a DHCP relay for this VLAN.
Remote
DHCP Server
1 .. 3
Enter the IP address of a DHCP server in dotted decimal notation.
Source
Address
Enter the source IP address that the Switch adds to DHCP requests from clients on this VLAN
before forwarding them. If you leave this field set to
0.0.0.0 , the Switch automatically sets the
source IP address of the DHCP requests to the IP address of the interface on which the packet is
received.
The source IP address helps DHCP clients obtain an appropriate IP address when you configure
multiple routing domains on a VLAN.
Option 82
Profile
Select a pre-defined DHCP option 82 profile that the Switch applies to all ports in this VLAN. The
Switch adds the Circuit ID sub-option and/or Remote ID sub-option specified in the profile to
DHCP requests that it relays to a DHCP server.
Add Click this to create a new entry or to update an existing one.
This saves your changes to the Switch’s run-time memory. The Switch loses these changes if it is
turned off or loses power, so use the
Save link on the top navigation panel to save your changes
to the non-volatile memory when you are done configuring.
Cancel Click Cancel to begin configuring this screen afresh.
Clear Click Clear to reset the fields to the factory defaults.
VID This field displays the ID number of the VLAN group to which this DHCP settings apply.
Type This field displays Server or Relay for the DHCP mode.
DHCP Status For DHCP server configuration, this field displays the starting IP address and the size of the IP
address pool.
For DHCP relay configuration, this field displays the first remote DHCP server IP address.
Select an entry’s check box to select a specific entry. Otherwise, select the check box in the
table heading row to select all entries.
Delete Select the configuration entries you want to remove and click Delete to remove them.
Cancel Click Cancel to clear the check boxes.
Table 235 IP Application > DHCP > DHCPv4 > VLAN (continued)
LABEL DESCRIPTION